Scanner Mechanism - Brother MFC620CN Service Manual

3.2.1 Scanner Mechanism

This mechanism consists of the document cover, the scanner unit (scanner cover), and the
automatic document feeder (ADF)*.
The scanner unit consists of a scanner top cover, CIS unit, CIS drive assembly, and scanner base.
The detailed illustration on the next page shows the components making up the ADF: document
pull-in roller, document separation roller, document feed roller, ADF motor, and document front
and rear sensors.
For further details on the sensors, see
White-level
reference film
CIS flat cable
CIS unit
Scanner base
ADF*
* MFC620CN/425CN/420CN/DCP120C and FAX2440C only.
Section 3.2.3.
3-5
Document cover
Scanner top cover
CIS drive assembly
(CIS motor)
CIS drive belt
CIS idle pulley
CIS rail
Scanner unit
(Scanner cover)
Confidential